org.apache.log4j.spi

Class NOPLogger

java.lang.Object

org.apache.log4j.Category

org.apache.log4j.Logger

org.apache.log4j.spi.NOPLogger

All Implemented Interfaces:

AppenderAttachable

public final class NOPLogger
extends Logger

No-operation implementation of Logger used by NOPLoggerRepository.

Since:

1.2.15

Field Summary

Fields inherited from class org.apache.log4j.Category

additive, bundle, level, name, parent, repository

Constructor Summary

Constructors

Constructor and Description
NOPLogger(NOPLoggerRepository repo, String name) Create instance of Logger.

Method Summary

Modifier and Type	Method and Description
void	addAppender(Appender newAppender) Add newAppender to the list of appenders of this Category instance.
void	assertLog(boolean assertion, String msg) If assertion parameter is false, then logs msg as an error statement.
void	callAppenders(LoggingEvent event) Call the appenders in the hierrachy starting at this.
void	debug(Object message)
void	debug(Object message, Throwable t)
void	error(Object message)
void	error(Object message, Throwable t)
void	fatal(Object message)
void	fatal(Object message, Throwable t)
Enumeration	getAllAppenders() Get all the Log4j 1.x appenders contained in this category as an Enumeration.
Appender	getAppender(String name) Look for the appender named as name.
Priority	getChainedPriority()
Level	getEffectiveLevel()
ResourceBundle	getResourceBundle()
void	info(Object message)
void	info(Object message, Throwable t)
boolean	isAttached(Appender appender) Is the appender passed as parameter attached to this category?
boolean	isDebugEnabled()
boolean	isEnabledFor(Priority level)
boolean	isInfoEnabled()
boolean	isTraceEnabled()
void	l7dlog(Priority priority, String key, Object[] params, Throwable t)
void	l7dlog(Priority priority, String key, Throwable t)
void	log(Priority priority, Object message)
void	log(Priority priority, Object message, Throwable t)
void	log(String callerFQCN, Priority level, Object message, Throwable t)
void	removeAllAppenders() Removes all previously added appenders from this Category instance.
void	removeAppender(Appender appender) Removes the appender passed as parameter form the list of appenders.
void	removeAppender(String name) Removes the appender with the name passed as parameter form the list of appenders.
void	setLevel(Level level)
void	setPriority(Priority priority)
void	setResourceBundle(ResourceBundle bundle)
void	trace(Object message)
void	trace(Object message, Throwable t)
void	warn(Object message)
void	warn(Object message, Throwable t)

Methods inherited from class org.apache.log4j.Logger

getLogger, getLogger, getLogger, getRootLogger

Methods inherited from class org.apache.log4j.Category

exists, forcedLog, getAdditivity, getCurrentCategories, getDefaultHierarchy, getHierarchy, getInstance, getInstance, getLevel, getLoggerRepository, getName, getParent, getPriority, getRoot, isErrorEnabled, isFatalEnabled, isWarnEnabled, setAdditivity, shutdown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NOPLogger

public NOPLogger(NOPLoggerRepository repo,
                 String name)

Create instance of Logger.

Parameters:

repo - repository, may not be null.

name - name, may not be null, use "root" for root logger.

Method Detail

addAppender

public void addAppender(Appender newAppender)

Add newAppender to the list of appenders of this Category instance.

If newAppender is already in the list of appenders, then it won't be added again.

Specified by:

addAppender in interface AppenderAttachable

Overrides:

addAppender in class Category

Parameters:

newAppender - The Appender to add.

assertLog

public void assertLog(boolean assertion,
                      String msg)

If assertion parameter is false, then logs msg as an error statement.

The assert method has been renamed to assertLog because assert is a language reserved word in JDK 1.4.

Overrides:

assertLog in class Category

Parameters:

assertion - The assertion.

msg - The message to print if assertion is false.

callAppenders

public void callAppenders(LoggingEvent event)

Call the appenders in the hierrachy starting at this. If no appenders could be found, emit a warning.

This method calls all the appenders inherited from the hierarchy circumventing any evaluation of whether to log or not to log the particular log request.

Overrides:

callAppenders in class Category

Parameters:

event - the event to log.

debug

public void debug(Object message)

Overrides:

debug in class Category

debug

public void debug(Object message,
                  Throwable t)

Overrides:

debug in class Category

error

public void error(Object message)

Overrides:

error in class Category

error

public void error(Object message,
                  Throwable t)

Overrides:

error in class Category

fatal

public void fatal(Object message)

Overrides:

fatal in class Category

fatal

public void fatal(Object message,
                  Throwable t)

Overrides:

fatal in class Category

getAllAppenders

public Enumeration getAllAppenders()

Get all the Log4j 1.x appenders contained in this category as an Enumeration. Log4j 2.x appenders are omitted.

Specified by:

getAllAppenders in interface AppenderAttachable

Overrides:

getAllAppenders in class Category

Returns:

Enumeration An enumeration of the appenders in this category.

getAppender

public Appender getAppender(String name)

Look for the appender named as name.

Return the appender with that name if in the list. Return null otherwise.

Specified by:

getAppender in interface AppenderAttachable

Overrides:

getAppender in class Category

Parameters:

name - The name of the Appender.

Returns:

The Appender.

getChainedPriority

public Priority getChainedPriority()

Overrides:

getChainedPriority in class Category

getEffectiveLevel

public Level getEffectiveLevel()

Overrides:

getEffectiveLevel in class Category

getResourceBundle

public ResourceBundle getResourceBundle()

Overrides:

getResourceBundle in class Category

info

public void info(Object message)

Overrides:

info in class Category

info

public void info(Object message,
                 Throwable t)

Overrides:

info in class Category

isAttached

public boolean isAttached(Appender appender)

Is the appender passed as parameter attached to this category?

Specified by:

isAttached in interface AppenderAttachable

Overrides:

isAttached in class Category

Parameters:

appender - The Appender to add.

Returns:

true if the appender is attached.

isDebugEnabled

public boolean isDebugEnabled()

Overrides:

isDebugEnabled in class Category

isEnabledFor

public boolean isEnabledFor(Priority level)

Overrides:

isEnabledFor in class Category

isInfoEnabled

public boolean isInfoEnabled()

Overrides:

isInfoEnabled in class Category

isTraceEnabled

public boolean isTraceEnabled()

Overrides:

isTraceEnabled in class Logger

l7dlog

public void l7dlog(Priority priority,
                   String key,
                   Object[] params,
                   Throwable t)

Overrides:

l7dlog in class Category

l7dlog

public void l7dlog(Priority priority,
                   String key,
                   Throwable t)

Overrides:

l7dlog in class Category

log

public void log(Priority priority,
                Object message)

Overrides:

log in class Category

log

public void log(Priority priority,
                Object message,
                Throwable t)

Overrides:

log in class Category

log

public void log(String callerFQCN,
                Priority level,
                Object message,
                Throwable t)

Overrides:

log in class Category

removeAllAppenders

public void removeAllAppenders()

Removes all previously added appenders from this Category instance.

This is useful when re-reading configuration information.

Specified by:

removeAllAppenders in interface AppenderAttachable

Overrides:

removeAllAppenders in class Category

removeAppender

public void removeAppender(Appender appender)

Removes the appender passed as parameter form the list of appenders.

Specified by:

removeAppender in interface AppenderAttachable

Overrides:

removeAppender in class Category

Parameters:

appender - The Appender to remove.

removeAppender

public void removeAppender(String name)

Removes the appender with the name passed as parameter form the list of appenders.

Specified by:

removeAppender in interface AppenderAttachable

Overrides:

removeAppender in class Category

Parameters:

name - The Appender to remove.

setLevel

public void setLevel(Level level)

Overrides:

setLevel in class Category

setPriority

public void setPriority(Priority priority)

Overrides:

setPriority in class Category

setResourceBundle

public void setResourceBundle(ResourceBundle bundle)

Overrides:

setResourceBundle in class Category

trace

public void trace(Object message)

Overrides:

trace in class Logger

trace

public void trace(Object message,
                  Throwable t)

Overrides:

trace in class Logger

warn

public void warn(Object message)

Overrides:

warn in class Category

warn

public void warn(Object message,
                 Throwable t)

Overrides:

warn in class Category